If you are referring to regular season games, then the Indianapolis Colts hold the record with 23 wins. (2008-2009)
It was Arsenal who went one season without a loss.
Regular Season the Colts do
Between 1970-1979, the Dallas Cowboys had the most regular season wins in the NFL with 105. The Miami Dolphins were second with 104 regular season wins.
As of as of March 8, 2012 The NFL team who has the most regular season wins since 1970 are the Pittsburgh Steelers with 396 regular wins since 1970.
The Miami Dolphins
The Chicago Bears have the most regular season wins (686) and the most total wins (702) of any NFL team.
The Yankees won 114 regular season games in 1998.
Green Bay Packers
The Colts have the most regular season wins for the 2000-2009 decade with 115 wins compared to the Patriots 112.
Dallas. Through the 2016 season, the Cowboys have 493 regular-season wins and 34 playoff wins for a total of 527. The Raiders have 456 regular-season wins and 25 playoff wins for a total of 481.
The Pittsburgh Steelers had the most regular season wins with 15. Including playoff wins, the New England Patriots had the most with 17.
Internazionale is the team in Serie A that has the most number of wins in a season.
Through the 2010 season, that is 101 regular season wins by the 1976 and 1977 teams.
The 1998 New York Yankees had the most wins in team history with 125. They had 114 wins during the regular season and 11 more in the postseason.
Washington Nationals during the regular season.
Detroit Red Wings, 62 wins